WCF::handleException() Unhandled exception: Call to undefined method gallery\data\image\Image::isNew()

#0 /home/dsoorkusserverpo/public_html/wcf/lib/system/template/TemplateEngine.class.php(324): include()
#1 /home/dsoorkusserverpo/public_html/wcf/lib/system/template/TemplateEngine.class.php(544): wcf\system\template\TemplateEngine->display('portalBoxLastGa...', 'gallery', false)
#2 /home/dsoorkusserverpo/public_html/gallery/lib/data/portal/box/LastGalleryImages.class.php(34): wcf\system\template\TemplateEngine->fetch('portalBoxLastGa...', 'gallery')
#3 /home/dsoorkusserverpo/public_html/wcf/lib/page/PortalPage.class.php(126): gallery\data\portal\box\LastGalleryImages->render()
#4 /home/dsoorkusserverpo/public_html/wcf/lib/page/AbstractPage.class.php(182): wcf\page\PortalPage->assignVariables()
#5 /home/dsoorkusserverpo/public_html/wcf/lib/page/AbstractPage.class.php(86): wcf\page\AbstractPage->show()
#6 /home/dsoorkusserverpo/public_html/wcf/lib/system/request/Request.class.php(58): wcf\page\AbstractPage->__run()
#7 /home/dsoorkusserverpo/public_html/wcf/lib/system/request/RequestHandler.class.php(108): wcf\system\request\Request->execute()
#8 /home/dsoorkusserverpo/public_html/index.php(10): wcf\system\request\RequestHandler->handle('wbb')
#9 {main}